Thanks for the link. When I started learning Go modules that spec was not available (or it was a lot smaller). After a brief look I feel the Go modules spec is longer and more complex than the (original) Go language spec which is quite ironic :-D. I still like Go although it's sad seeing it straying from the 'one true' path of simplicity.
It's a bit shorter than the current spec, but it does cover more: how it works conceptually, how the default toolchain works, and how it interacts with a lot of things outside of a world it creates on its own (which is what a language is).
